502 SCROPHULARIAOE^ ' 



* Calyx prismatic and barely 5-toothed, or rarely campanulate and 

 hardly 5-cleft : corolla more or less bilabiate : stamens four. 



10 Dlplacus Shrubby perennials : capsule firm-coriaceous, narrow and 

 closely invested by the calyi, tardily dehiscent down the upper suture. 



11 Eunanns Low annuals : cdpsule from almost bony and indehiscent to 

 membranaceous . 



12 Mimnlus Annual or perennial herbs, capsule membranceous tardily 

 ■ separating from the central placentiferous column. 



* * Calyx 5-parted or deeply 4-5-lobed : antheriferous stamens only 

 2, the posterior pair, the anterior pair sterile rudiments or wanting. 



13 Oratiola Sterile filaments none, or short and entire, 



14 Uysanthes Sterile filaments present, slend«r and forked. 



* * * Calyx and corolla both 5-lobed and nearly regular: antherif- 

 erous stamens 4, nearly equal. 



15 Llmosella Small plants with the flowers on scapes. 



Ill Leaves various. Lower lip or lateral lobes of the co- 

 rolla external in the bud. 



Teibe V Corolla usually little if at all bilabiate, the lobes all 

 plain, the lateral or one of them externkl in the bud. 



* Stamens 2, distinct, exserted ; filaments straight, inserted at or 

 below the sinuses between the two lateral and the posterior lobe of 

 the corolla. 



16 Synthyris Corolla from oblong to short-campanulate- 



17 "Veronica Corolla from rotate with very short tube to salverform, 



* * Stamens 4, distinct, not exserted, inserted on the upper side of 

 the tube of the corolla 



18 Digitalis Corolla tubular-funnelform, somewhat irregular. 



Tribe vi Corolla manifestly bilabiate, the upper lip erect and 

 concave or galeate, entire or emarginate, rarely 2-cleftj the lower 

 3-cleft, exterior in the bud. 



* Ovules and usually the seeds numerous. 



*■ Anther-cells unequal or dissimilar, the'outer one';affixed by its 

 middle, the other pendulous from its upper end, mostly smaller, some- 

 times sterile. 



19 Castillela Upper lip of the corolla much longer than the very short 

 and 3-toothed lower one. 



80 Orthocarpus Upper lip of the corolla scarcely lonser and usually 

 narrower than the inflated l-S-saccate lower one. 



21 Adenostegia Upper lip of the corolla not longer nor much if any 

 narrower than the 3-crenulate or entire lower one. 



- *r Anther-cells equal, parallel and alike in all 4 stamens. 



22 Fedicnlaris Calyx split anteriorly, not inflated in fruit. 



23 RHiNANTHns Calyx 4-toothed, inflated in fruit. 



.,-*,*. 0"^"les only two in each cell, one sessile and ascending, the 

 other laterally attached. 



